Radiation instrument



FIG. 1 is a front-side elevational, perspective view of a radiation instrument showing my new design;

FIG. 2 is a side elevational view thereof and is taken at a slight angle downward to the horizontal;

FIG. 3 is a front elevational view thereof and is taken at a slight angle downward to the horizontal;

FIG. 4 is a perspective, rear elevational view thereof and shows the radiation device with its casing in the opened state; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a radiation instrument, as shown and described. 